Note: Descriptions are shown in the official language in which they were submitted.
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The present invention relates to a comblne-harvester.
Combine harvesters generally comprise a thresher
mounted in a housing which operates in tangential flow, straw
shakers connected thereto and, disposed at the outlet end of
the straw shakers, a threshing and separating device comprising
a rotor and housing and operating according to the axial flow
system. This threshing and separating device, which exceeds
the width of the combine-harvester housing, is provided with
two lateral outlet openings and connected to a chaffcutter unit,
whereby at least part of the housing of the threshing and
separating device can be folded.
Such a combine-harvester was described in German
patent application P 37 35 669Ø In adapting to harvest
conditions without an increased grain loss occurring, the
efficiency of a combine-harvester can be increased through
the arrangement of a threshing and separating device that can
be by-passed. Practice has shown that a disadvantage of such
a combine-harvester is that it does not satisfactorily meet
the requirements placed on modern combine-harvesters with
respect to the subsequent treatment of the straw and its
deposit on the field. For example, if the threshing and
separating device is by-passed, it is not possible to sub-
sequently thresh the straw and deposit it on the field in a
single swath. As a result, the following hay baler must
cover twice the distance in order to pick up the straw de-
posited in two swathes. Furthermore, it is also not possible
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to chop the harvested crop without subsequent threshing
which is necessary with some types of grains.
The present invention provides a combine-harvester
comprising a thresher mounted in a first housing which operates
in tangential flow, straw shakers connected thereto and, dis-
posed at the outlet end of the straw shakers, a threshing and
separating device comprising a rotor and a second housing opera-
ting in axial flow, the threshing and separating device exceed-
ing the width of the combine-harvester housing, and being pro-
vided with two lateral outlet openings connected to a chaff
cutter unit, at least part of the housing of the threshing
and separating device being foldable, with channels, whose ends
open above the face ends of the chaff cutter, being connected
to the two lateral outlet openings of the threshing and separa-
ting device.
The present invention is a combine-harvester of
the type previously described that is more versatile in that
the two streams of crop material produced by the threshing and
separating device are fed to a common chaff cutter. This is
accomplished by connecting a channel to each of the two lateral
outlet openings of the threshing and separating device, the
ends of these channels ending above the face ends of the chaff
cutter. The floor of each channel is inclined downwardly from
the outlet opening of the threshing and separating device to
the chaff cutter. A pivotable cover is mounted adjacent the
chaff cutter so that the crop material can either be fed to the
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1321938
chaff cutter or directly onto the field. A further advantage of
the present invention is that the width of the chaff cutter
matches that of all the straw shakers.
Therefore this invention seeks to provide a harvester
thresher, comprising: a threshing device; straw shakers located
downstream said threshing device and having a discharge end; a
threshing and separating device located downstream said straw
shaker and having two lateral product outlet openings; a chopper
having two opposite ends; and passages each having one end
connected with a respective one of said product outlet openings of
said threshing and separating device and another end located above
a respective one of said ends of said chopper, each of said
passages having a bottom which extends in a downwardly inclined
manner from a respective one of said product outlet openings of
said threshing and separating device to said chopper.
An embodiment of the present invention is illustrated,
merely by way of example, in the accompanying Figures, in which:
Figure 1 shows a combine-harvester in side view;
Figure 2 shows a top view of the rear portion of the
combine-harvester without hood;
Figure 3 shows an illustration taken along the line
III-III in Figure 2; and
Figure 4 shows the part illustrated in Figure 3 in a
different position.
In the Figures, reference numeral 1 identifies the
housing of a combine-harvester in which a threshing mechanism
operating in tangential flow is shown. The threshing mechanism is
formed in a known fashion from a threshing drum 2 and a threshing
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concave 3. Straw shakers 4 are connected to the threshing
mechanism and a return floor 5 and a sieve means 6 are also
provided. A threshing and separating device 11, which comprises a
rotor 7 and housing 8, follows the straw shakers 4. A feeder drum
9 having entrainment projections 9' is provided above the ends of
the straw shakers 4 in front of the intake opening 10 of the
threshing and separating device 11 to ensure that the harvested
crop comin~ from the shakers 4 and containing residual grain is
transferred to the device 11. Alternatively, as illustrated in
Figures 3 and 4, the
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ends of shakers 4 can be equipped with additional conveying
elements in accordance with German patent application P 3814 036.5
to ensure that the harvested crop is transferred to threshing
and separating device 11.
As Figure 2 shows, the two ends of the rotor 7 pro--
trude beyond the housing 1. These two protruding parts of the
rotor are provided with winnowing shovels 12 and are surrounded
by a discharge housing 13. Channels 15, whose ends 15' open
out above the face ends of a chaff cutter 16, are connected
to the outlet openings 14 of discharge housing 13. The floors
17 of the channels 15 are inclined downwardly, starting from
the discharge housings 13. The chaff cutter 16 itself is loca-
ted behind and lower than the threshing and separating device
11. As can be seen from Figure 2, the width of the chaff
cutter 16 matches the width of the entire straw shaker arrange-
ment 4. Figures 3 and 4 show that a cover 18 which can be
pivoted about the axle 20 into the position illustrated by the
dash lines is mounted adjacent the chaff cutter 16. Depending
on requirements, the straw leaving the channels 15 is fed
either to the chaff cutter 16 (with the cover in the position
illustrated by the solid lines) or directly onto the field
(with the cover in the position illustrated by the dash lines)~
To be able to better guide the straw when it has been chopped,
a pivotable guide hood 22 is mounted to the outlet of the
chaff cutter, this guide hood being pivoted into the position
illustrated by the dash lines (Figures 3 and 4) during deposit
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of a swath.
It is clear from Figure 4 that a segment 8' of the
housing 8 can be pivoted upwardly so that the threshing and
separating device 11 becomes ineffective. The straw coming
from the straw shakers 4 is then picked up only by the rotor
7 about approximately 45 of its periphery and then ejected
from above either into the chaff cutter 16 or onto the cover
18.
So that long straw can be transferred reliably to
the channels 15, additional wall sections 23 are provided that
extend adjacent a lower portion of the periphery of the housing
8. Wall sections 23 are connected to the two face ends of the
housing 8 and widen as they extend upwardly from the housing
floor 17 to extend over essentially the entire width of the
housing outlet openings 14.
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